The Figure Below Shows the Isocost Lines and the Isoquant

Multiple Choice

The figure below shows the isocost lines and the isoquant map for a firm producing golf tees. FIGURE 8- 6
-Refer to Figure 8- 6. Suppose this firm is producing 4000 golf tees with 10 units of capital and 25 units of labour. The marginal rate of substitution between capital and labour is

A) 100.
B) 40.
C) 0.025.
D) 0.4.
E) 2.5.